Just trying to figure out what’s a ballpark cost to replace a valve on a steam radiator- any idea? And could this be a DIY project?


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  1. It may sound like a simple task but if you have zero experience this may be a headache for you. The above posts are right. Things I would add — If you have a hot water system you will have to drain the system and fill and bleed radiators when you finish. Always double wrench so you’re not unthreading the pipe below your connection. It’s best to replace not only the shut off valve but the connection inside the radiator too. For that you will need a special tool to remove the union. ( this is optional, many people don’t replace that part ) Be sure to use a good pipe thread paste. It will smell when it heats up, that’s normal.

  2. Since I don’t know your building, remember that some radiators require you to use left/ right nipples. Drives you crazy if you run into one of these and don’t know about it. It also drives you crazy when you need one and can’t find one.

    Standard radiator valve comes with a union as part of the assembely and you should assume that you replace both sides. Wiley kind of says that.

  3. oh – I should also add that the valve and the threads that go into your radiator have to match – they probably won’t which means when you replace the valve you’ll most probably have to replace the matching fitting on the rad.

  4. 175 -200$

    assuming you are talking about replacing the whole valve

    call a plumber – removing the valve is not as easy as it looks and if your not careful you will find yourself with a much more expensive repair

  5. I’d start DIY first thing in the AM and have plumber on standby just in case you bust the pipe. You are going to need a large pipe wrench or a wrench and a cheater bar. Leverage is the only way to get those guys off.

  6. Yes, it is my building.

    I think the valve isn’t opening fully- to be clear, its not the air vent, but the valve that needs replacing.

  7. Totally DIY max $25 in a hardware store for the fanciest kind (I assume you’re talking about the valve on the end opposite the main hot water intake knob).

  8. simple enough task. Maybe ask your super or building handyman/porter. Throw a good tip and it’ll save you loads of money as opposed to going with a plumber.

  9. Is this a building you own and control the boiler or a we talking about your apartment? BTW, are we talking air vent or valve?